muzzle crown or no crown??
- Thread starter ryrack
- Start date
Crowning a rifle barrel, in simplest terms, is shaping the muzzle so the rifling's edge is protected from impact. Most factory barrels have
a round, convex-shaped crown from bore's edge to the barrel's outside diameter. That's easy to make and finish, plus looking rather pleasing.
The accuracy part of the crown means the land and groove part of the barrel must let the bullet's base exit evenly all the way around. When this happens, gas escapes uniformly and evenly around the bullet's base. If gas escapes unevenly (poor crown, even unsquare bullet bases), the point of greatest gas release will push the bullet in the opposite direction and tilt it. Tilted bullets leaving the barrel just don't shoot straight; how far they move sideways depends on their velocity, spin rate, and degree of tilt (or yaw, as it's sometimes called).
This photo illustrates a crisp and evenly cut crown. You can see the traces of powder residue as it escaped evenly from around the base of the bullet as it exited.
a round, convex-shaped crown from bore's edge to the barrel's outside diameter. That's easy to make and finish, plus looking rather pleasing.
The accuracy part of the crown means the land and groove part of the barrel must let the bullet's base exit evenly all the way around. When this happens, gas escapes uniformly and evenly around the bullet's base. If gas escapes unevenly (poor crown, even unsquare bullet bases), the point of greatest gas release will push the bullet in the opposite direction and tilt it. Tilted bullets leaving the barrel just don't shoot straight; how far they move sideways depends on their velocity, spin rate, and degree of tilt (or yaw, as it's sometimes called).
This photo illustrates a crisp and evenly cut crown. You can see the traces of powder residue as it escaped evenly from around the base of the bullet as it exited.
Last edited:
Dfariswheel
New member
The actual crown is the slight bevel right where the rifling ends.
The purpose is to insure there are no burrs or other imperfections left by the machining process.
The end of the muzzle, often called the crown, may or may not have a real effect on accuracy.
Remington believes their spherical muzzles enhance accuracy.
Older types of muzzles are mostly to protect the rifling by recessing it in one way or another.
The purpose is to insure there are no burrs or other imperfections left by the machining process.
The end of the muzzle, often called the crown, may or may not have a real effect on accuracy.
Remington believes their spherical muzzles enhance accuracy.
Older types of muzzles are mostly to protect the rifling by recessing it in one way or another.